❔ Tell DbProviderFactory what connection string to use not working?

DbProviderFactories.RegisterFactory("System.Data.MySql", MySqlConnectorFactory.Instance);
serviceCollection.AddSingleton(DbProviderFactories.GetFactory("System.Data.MySql"));
serviceCollection.AddTransient<MySqlConnection>(provider => new MySqlConnection(config.GetConnectionString("Default")));

DbProviderFactories.RegisterFactory("System.Data.MySql", MySqlConnectorFactory.Instance);
serviceCollection.AddSingleton(DbProviderFactories.GetFactory("System.Data.MySql"));
serviceCollection.AddTransient<MySqlConnection>(provider => new MySqlConnection(config.GetConnectionString("Default")));